Keg



FIG. 1 is a top perspective view of a keg, in accordance with my new design;

FIG. 2 is a bottom perspective view of the keg of FIG. 1;

FIG. 3 is a side elevational view of the keg of FIG. 1; and,

FIG. 4 is a top plan view of the keg of FIG. 1.

The portions of the keg shown in broken lines form no part of the claimed design. 

The ornamental design for a keg, as shown and described. 